Windows Vista Disadvantages

-Requirements high Configurain
-Operating System Cost is High
-Replace the old Hardware, Because the Drivers compatibility
-Change The windows Background. It differ from other os

Windows XP Disadvantages

-Product activation Problem.
-Prone to crashes and hence unstable.
-OS requires significant system resources.
-Parallel port not recognized.
-Susceptable to virus, hacking & other security Problems.
-Retail pricing is high.
-Old peripherals not widely supported.
-Difficult to administer.
-Many flaws and bugs are present in it.
-Older DOS programs may not run on this version.
-No file encryption facility in XP home edition.

Windows 7 of Advantages

- Windows 7 is faster than its previous Versions.
- Calculator has modified with Standard, Scientific, Programmers, and Static with new features like unit conversion, calculations like fuel economy and auto lease payment.
- WordPad in Windows 7 has improved. It can be used to open, edit file names with docx extension. Word prediction is the new feature in Word Pad. Realistic brush has been added in Paint.
- It also supports advanced touch and handwriting recognition.
- Windows 7 supports Virtual Hard Disks with the support of enhanced performances of multi core processors.
- Windows 7 allows the different vendors graphic cards.
- it also allows the user to overcome the clutter in the desktop by introducing three new features Aero Peek, Aero shake and snap.
- Networking has been made much easier than its previous operating systems.
- Windows Media Player 12 has got much enhanced features, drag and drop option.

Windows Vista Advantages

-New Appearance of windows
Desktop, startbutton, start menu, taskbar etc.
-High Level Security for net
-New Media players
-Searching Feature
-Differnt time Format Set and Show
-Parental controls Games etc from Childerns

Advantages of Windows XP

-Hardware support without drivers
-Restore and Rollback
-Better GUI features the previous versions
-Wi-Fi & Wireless LAN Supporting
-Support plug and play
-Headless Systems
-High Security
-Hibernate Once Resume Many
-User friendly OS
-Multiple and Remote Boot Options

Windows Server 2008

1. Server Core Installation
Server Core installations provide a minimal environment for specific roles.
-Active Directory Domain Services
-DNS/DHCP
-File and Print Server
-IIS

2. Hyper-V
Microsoft loves talking about Hyper-V, the virtualization technology built into Windows Server 2008. Hyper-V provides a layer between the hardware and the operating system which allows virtual machines the ability to communicate directly with the hardware, bypassing the host operating system and increasing performance.

3. Terminal Services
Microsoft has 3 new Terminal Services components, RemoteApp, TS WebAccess, and TS Gateway. These concepts will be familiar to any Citrix administrator.

4. Self Healing NTFS
There is a worker thread which runs in the background that corrects the NTFS partition should any problems be found.

5. Support for Hot Swappable Components
Windows Server 2008, while it is up and running, will acknowledge any hardware changes when hot swapping components.

6. Network Access Protection (NAP)
NAP keeps non-compliant computers off your network. NAP can monitor specific computer settings to enforce your workstation compliance standards.

7. Others
Windows Server 2008 includes IIS 7.0 which is a new build that is more capable of delivering streaming media, ASP, and PHP content and applications. It also has an updated management tool which allows you to manage multiple IIS servers from a single MMC.